Ultraviolet-resistant coating film

Abstract

The utility model relates to the technical field of coating films, and discloses an ultraviolet-resistant coating film which comprises a paint layer, a film-shaped base body, a fiber net and a back adhesive layer, the fiber net is embedded in the film-shaped base body and divided into an upper layer and a lower layer, the paint layer is located on the upper layer of the film-shaped base body, and the back adhesive layer is located on the lower layer of the film-shaped base body; the paint layer sequentially comprises a finishing coat, an ultraviolet-resistant layer and a primer layer from top to bottom, and the primer layer is in contact with the upper layer of the film-shaped substrate. According to the utility model, the ultraviolet-resistant layer made of titanate HY-311, glycerol triglycidyl ether and diaminodiphenyl sulfone is arranged between the paint layers, so that the ultraviolet resistance of the whole coating film and the adhesive force between the paint layers are improved, and the service life of the coating film is greatly prolonged. The coating film provided by the utility model further comprises a fiber net which is embedded in the film-shaped base body, so that the overall strength of the coating film is improved, the film-shaped base body is made of a flexible epoxy curing agent, and the flexibility of the coating film is improved while the strength is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating films, in particular to an ultraviolet light resistant coating film. Background Art

[0002] Coating film, also known as paint film, is composed of one or more coating layers. According to the properties of the coating, it can be divided into a wide variety of coating films. There are many types of coating films on the market today, which can basically meet people's daily needs, but there are still certain problems: for example, it is difficult for coating films to achieve UV protection when used. Under long-term ultraviolet irradiation, holes or cracks will appear on the surface or even the internal coating of the coating film, which will greatly reduce the performance of the coating film and even cause the surface coating to fall off, thereby shortening the service life of the coating film. Therefore, increasing the UV resistance of the coating film is particularly important for coating film products. Utility Model Content

[0003] In order to achieve the above-mentioned purpose, the utility model provides a UV-resistant coating film, which to a certain extent solves the problems of aging, cracking, and shedding of the coating film (paint film) caused by long-term exposure to UV environment.

[0004] The utility model provides an ultraviolet light resistant coating film, comprising a paint layer, a film-like substrate, a fiber net and an adhesive layer, wherein the fiber net is embedded in the film-like substrate and is divided into an upper and a lower layer, the paint layer is located on the upper layer of the film-like substrate, and the adhesive layer is located on the lower layer of the film-like substrate;

[0005] The paint layers are topcoat, UV-resistant layer and primer layer from top to bottom, and the primer layer is in contact with the upper layer of the film-like substrate.

[0006] Furthermore, the thickness of the topcoat is 4-10 mm.

[0007] Furthermore, the thickness of the UV-resistant layer is 0.5-3 cm.

[0008] Furthermore, the thickness of the primer layer is 8-22 μm.

[0009] Furthermore, the film-like matrix is ​​a flexible epoxy curing agent.

[0010] Furthermore, the fiber mesh is in a grid shape, and is made of silk protein fiber.

[0011] Compared with the prior art, the UV-resistant coating film of the utility model embodiment has the following beneficial effects:

[0012] The coating film provided by the utility model is provided with an ultraviolet-resistant layer between the paint layers, wherein the ultraviolet-resistant layer is composed of bisphenol A type epoxy resin as the base resin, titanate HY-311, propylene glycol triglycidyl ether and diaminodiphenyl sulfone. Titanate HY-311 is used as a coupling agent; propylene glycol triglycidyl ether contains epoxy groups, which can provide more ring-opening reaction sites and promote high cross-linking of epoxy resin; diaminodiphenyl sulfone is used as a curing agent, so that each monomer of the epoxy resin reacts and connects to form a long-chain polymer and solidifies. These three raw materials are formulated into a modifier, which can greatly increase the cross-linking degree of the epoxy resin, thereby improving the ultraviolet resistance of the entire coating film and the adhesion between the paint layers, and greatly extending the service life of the coating film.

[0013] The coating film provided by the utility model also includes a fiber mesh embedded in the membrane substrate, which improves the overall strength of the coating film, wherein the material of the membrane substrate is a flexible epoxy curing agent, which increases the strength and the flexibility of the coating film. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a structural diagram of the ultraviolet light resistant coating film of the embodiment of the utility model.

[0016] In the figure, 1, topcoat; 2, UV-resistant layer; 3, primer layer; 4, fiber mesh; 5, film substrate; 6, adhesive layer. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] like Figure 1 As shown, a preferred embodiment of the utility model is a UV-resistant coating film, comprising: a paint layer, a film-like substrate 5, a fiber mesh 4 and a back adhesive layer 6, wherein the fiber mesh 4 is embedded in the film-like substrate 5 and is divided into an upper and lower layer, wherein the paint layer is located on the upper layer of the film-like substrate 5, and the back adhesive layer 6 is located on the lower layer of the film-like substrate 5;

[0022] The paint layers are composed of a topcoat 1, an ultraviolet resistant layer 2 and a primer layer 3 from top to bottom, and the primer layer 3 is in contact with the upper layer of the film-like substrate 5 .

[0023] It should be noted that, in the paint layer, the main raw materials of the topcoat 1 include: dipropylene glycol methyl ether and dipropylene glycol butyl ether, wherein the mass ratio of dipropylene glycol methyl ether to dipropylene glycol butyl ether is 1.5-2.5:2.5-2.5.

[0024] Preferably, the thickness of the topcoat 1 is 4-10 mm.

[0025] The main raw materials of the UV-resistant layer 2 include: epoxy resin, titanate HY-311, propylene glycol triglycidyl ether and diaminodiphenyl sulfone, wherein the mass ratio of epoxy resin, titanate HY-311, propylene glycol triglycidyl ether and diaminodiphenyl sulfone is 1:1-10:1-10:0.1-5. The key to the UV resistance of the utility model is: using titanate HY-311 as a coupling agent; propylene glycol triglycidyl ether itself contains epoxy groups, which can provide more ring-opening reaction sites and promote high cross-linking of epoxy resin; diaminodiphenyl sulfone is used as a curing agent to make each monomer of epoxy resin react and connect to form a long-chain polymer for curing. The above three materials are made into a modifier according to the above ratio, which can greatly increase the cross-linking degree of epoxy resin, thereby improving the UV resistance of the coating film and the adhesion between the paint layers, and greatly extending the service life of the coating film.

[0026] It should be noted that the preparation method of the ultraviolet-resistant layer 2 in the utility model comprises the following steps: Step 1: After mixing the epoxy resin, solvent and xylene, slowly add titanate HY-311 and propylene glycol triglycidyl ether according to the above ratio, stir thoroughly until the mixture is completely dissolved and there is no flocculent precipitation, add diaminodiphenyl sulfone, and continue stirring until the overall mixed liquid is uniform to obtain a mixed liquid 1.

[0027] The solvent comprises xylene and n-butanol, and the mass ratio of xylene to n-butanol is 21:9.

[0028] Step 2: Put the mixed solution 1 obtained in step 1 into a magnetic stirrer and stir it at 25° C. for 15-25 minutes. Then put it into an ultrasonic cleaner and perform ultrasonic degassing for 15-25 minutes to obtain a mixed solution 2.

[0029] The ultrasonic power is controlled at 550-630W, and the ultrasonic temperature is controlled at 14-17° C. The ultrasonic process can defoam and evenly disperse the modifier in the epoxy resin to achieve a sufficient cross-linking reaction.

[0030] Step 3: Take the mixed solution 2 obtained in step 2 out of the ultrasonic cleaner, add a curing agent to cure it, stir it evenly, put it into the ultrasonic cleaner again, and perform ultrasonic defoaming for about 5-15 minutes, with the ultrasonic power controlled at 400-500W and the temperature controlled at 15-20°C.

[0031] The curing agent used is polyamide curing agent 651, and its dosage is 40wt.%.

[0032] The preparation method of the UV-resistant layer 2 in the utility model is to add in the following order: (1) bisphenol A type epoxy resin (2) titanate HY-311 (3) propylene glycol triglycidyl ether (4) diaminodiphenyl sulfone. Stir continuously when adding each raw material, and keep stirring for at least 1 minute before adding the next raw material.

[0033] Preferably, the thickness of the UV-resistant layer 2 is 0.5-3 cm.

[0034] It should be noted that the ingredients of the primer layer 3 mainly include: hydroxymethyl cellulose, oxidized starch, polyvinyl alcohol, polyethylene glycol, epoxy resin glue and modified acrylic pressure-sensitive adhesive. The mass ratio of hydroxymethyl cellulose, oxidized starch, polyvinyl alcohol, polyethylene glycol, epoxy resin glue and modified acrylic pressure-sensitive adhesive is: 25-35 parts: 20-30 parts: 30-50 parts: 30-40 parts: 30-40 parts: 15-25 parts.

[0035] Preferably, the thickness of the primer layer 3 is 8-22 μm.

[0036] Preferably, the film-like matrix 5 is a flexible epoxy curing agent.

[0037] It should be noted that the film-like substrate 5 uses a flexible epoxy curing agent, which can greatly improve the flexibility of the coating film.

[0038] Preferably, the fiber mesh 4 is in a grid shape, and is made of silk protein fiber.

[0039] It should be noted that the fiber mesh 4 is embedded in the film-like matrix 5, thereby improving the overall strength of the coating film.

[0040] The working process of the utility model is as follows: during production, a flexible epoxy curing agent (membrane matrix 5) is first wrapped on the outer surface of a soft silk protein fiber net 4, and after drying, a primer layer 3 is sprayed on the upper surface of the soft silk protein fiber net 4, wherein the thickness of the primer layer 3 is controlled to be 8-22 μm, and after the primer layer 3 is dried, the prepared UV-resistant layer 2 is sprayed continuously, wherein the thickness of the UV-resistant layer 2 is controlled to be 0.5-3 cm, and after the UV-resistant layer 2 is dried, a topcoat 1 is sprayed on its surface, wherein the thickness of the topcoat 1 is controlled to be 4-10 mm, and the upper layer of the UV-resistant coating film is completed. After the upper layer is completely dried, a back adhesive layer 6 is sprayed on the lower layer of the flexible epoxy curing agent (membrane matrix 5) to obtain a UV-resistant coating film.

[0041] By embedding the fiber mesh 4 of the soft silk protein fiber inside the film-like matrix 5, that is, wrapping the film-like matrix 5 on the outer surface of the fiber mesh 4, not only the flexibility of the coating film is enhanced, but also the mechanical strength of the coating film is greatly improved. By spraying the paint layer (topcoat 1, UV-resistant layer 2 and primer layer 3), the cross-linking degree of the coating film is increased, thereby improving the UV resistance of the entire coating film and the adhesion between the paint layers, greatly extending the service life of the coating film.

[0042] The above is only an implementation example of the present invention, but it cannot be used to limit the scope of the present invention. Any structural changes made according to the present invention, as long as they do not lose the essence of the present invention, should be deemed to fall within the scope of protection of the present invention and be subject to restrictions.

[0043] It should be noted that the system provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiment of the utility model can be decomposed or combined. For example, the modules in the above embodiment can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiment of the utility model are only for distinguishing the modules or steps, and are not regarded as improper limitations of the utility model.

[0044] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0045] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A UV-resistant coating film, characterized in that: It comprises a paint layer, a film-like substrate, a fiber net and a back adhesive layer, wherein the fiber net is embedded in the film-like substrate and is divided into an upper and a lower layer, the paint layer is located on the upper layer of the film-like substrate, and the back adhesive layer is located on the lower layer of the film-like substrate; The paint layers are topcoat, UV-resistant layer and primer layer from top to bottom, and the primer layer is in contact with the upper layer of the film-like substrate.

2. The UV-resistant coating film according to claim 1, characterized in that: The thickness of the topcoat is 4-10 mm.

3. The UV-resistant coating film according to claim 1 or 2, characterized in that: The thickness of the UV-resistant layer is 0.5-3 cm.

4. The UV-resistant coating film according to claim 3, characterized in that: The thickness of the primer layer is 8-22 μm.

5. The UV-resistant coating film according to claim 4, characterized in that: The film-like matrix is ​​a flexible epoxy curing agent.

6. The UV-resistant coating film according to claim 4 or 5, characterized in that: The fiber net is in a grid shape and is made of silk protein fibers.

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